mirror of
https://github.com/jiawanlong/Cesium-Examples.git
synced 2025-11-04 09:14:17 +00:00
269 lines
10 KiB
JavaScript
269 lines
10 KiB
JavaScript
/**
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* Created with JetBrains WebStorm.
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* User: CC
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* Date: 14-12-30
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* Time: 下午5:09
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* To change this template use File | Settings | File Templates.
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*/
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//判定一下是否存在了SuperMap.Web，如果没有则初始化一个
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if(SuperMap.Web == undefined )
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{
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SuperMap.Web = new Object();
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}
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//判定一下是否存在了SuperMap.Web.iConnector，如果没有则初始化一个
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if(SuperMap.Web.iConnector == undefined )
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{
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SuperMap.Web.iConnector = new Object();
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}
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/**
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* Class:
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* AMap适配器类
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* @constructor
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*/
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SuperMap.Web.iConnector.AMap = function(){
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}
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/**
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* APIMethod:
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* 创建AMap的扩展图层，这里的图层中切片的来源为iserver服务器
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* @param url {String} 地图服务的url地址，如：“http://localhost:8090/iserver/services/map-china400/rest/maps/China”
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* @param options 可选的参数
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* transparent - {Boolean} 设置切片是否透明，默认为true
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* cacheEnabled - {Boolean} 设置是否使用缓存，默认为false
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* layersID - {String} 设置临时图层的id，一般用于专题图的叠加使用
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* @returns {Object} 返回AMap地图的扩展图层对象
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*/
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SuperMap.Web.iConnector.AMap.getLayer = function(url,options){
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if(url == undefined)
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{
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return;
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}
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var tileLayer = new AMap.TileLayer({
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getTileUrl:getTileUrl
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});
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var layerUrl = url + "/image.png?redirect=false&width=256&height=256";
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//切片是否透明
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var transparent = true;
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if(options && options.transparent !=undefined)
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{
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transparent = options.transparent;
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}
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layerUrl += "&transparent=" + transparent;
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//是否使用缓存
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var cacheEnabled = false;
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if(options && options.cacheEnabled !=undefined)
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{
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cacheEnabled = options.cacheEnabled;
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}
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layerUrl += "&cacheEnabled=" + cacheEnabled;
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//如果有layersID，则是在使用专题图
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if(options && options.layersID !=undefined)
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{
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layerUrl += "&layersID=" +options.layersID;
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}
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//如果有projection，目前只支持4326或者3857的地图。
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var projection="3857";
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if(options&&options.projection){
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if(options.projection==="4326"){
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projection="4326";
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}
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}
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//计算分辨率和比例尺
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var resLen = 17;
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var resStart = 0;
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var resolutions = [];
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var dpi = 95.99999999999984;
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var scales = [];
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if(projection==="3857"){
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for(var i=resStart;i<=resLen;i++){
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var res3857 = 156543.0339/Math.pow(2,i);
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resolutions.push(res3857);
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var scale3857 = 0.0254/dpi/res3857;
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scales.push(scale3857);
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}
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tileLayer.scales=scales;
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}
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else{
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for(var i=resStart;i<=resLen;i++){
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var res4326 = 1.40625/Math.pow(2,i);
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resolutions.push(res4326);
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var scale4326 = 0.0254*360/dpi/res4326/Math.PI/2/6378137;
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scales.push(scale4326);
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}
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tileLayer.scales=scales;
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}
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function getTileUrl(x, y, z){
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var po = Math.pow(2,z);
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x-=po/2;
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y=po/2-y-1;
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//使用bounds出图
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var left = x*256*resolutions[z];
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var bottom = y*256*resolutions[z];
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var right = (x + 1)*256*resolutions[z];
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var top = (y + 1)*256*resolutions[z];
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//将bounds组合到url里面
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var tileUrl = layerUrl+"&viewBounds=" +"{\"leftBottom\" : {\"x\":" + left +",\"y\":" + bottom +"},\"rightTop\" : {\"x\":" + right +",\"y\":" +top + "}}";
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tileUrl +="&scale=" +scales[z];
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var epsg=projection==="3857"?3857:4326;
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tileUrl += "&prjCoordSys={\"epsgCode\":"+epsg+"}";
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return tileUrl;
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}
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return tileLayer;
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}
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/**
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* APIMethod:
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* 将其他坐标系下的点转换为高德地图的点
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* @param array 点数组，支持四种形式的点：
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* 1、var points = [
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* {x:116.1,y:38.9},
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* {x:114.1,y:34.1}
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* ];
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* 2、var points = [
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* new SuperMap.Geometry.Point(116.1,38.9),
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* new SuperMap.Geometry.Point(116.1,38.9)
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* ];
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* 3、var points = [
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* new SuperMap.LonLat(116.1,38.9),
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* new SuperMap.LonLat(116.1,38.4)
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* ];
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* 4、var points = [
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* new AMap.LngLat(116.404, 39.915),
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* new AMap.LngLat(39.9,116.35)
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* ];
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* @param projection {SuperMap.Projection} 待转换点的投影系（数组里面的所有点投影系都必须是统一的），默认为4326.
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* @returns {Array} Amap.LatLng对象的数组
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*/
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SuperMap.Web.iConnector.AMap.transferPoint = function(array,projection){
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if((typeof array) == "object" && array != null && array.constructor == Array)
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{
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var pro = projection || new SuperMap.Projection("EPSG:4326");
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var points = []
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//分几种不同的情况，现在只提供两种
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for(var i = 0;i<array.length;i++)
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{
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var smPoint;
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if(array[i].CLASS_NAME && array[i].CLASS_NAME == "SuperMap.LonLat")
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{
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//首先转换为标准4326的坐标
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smPoint = SuperMap.Projection.transform(new SuperMap.Geometry.Point(array[i].lon,array[i].lat),pro,new SuperMap.Projection("EPSG:4326"));
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}
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//支持{x:118,y:38}和SuperMap.Geometry.Point的形式，因为都存在x和y
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else if(array[i].x != undefined && array[i].y != undefined)
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{
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//首先转换为标准4326的坐标
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smPoint = SuperMap.Projection.transform(new SuperMap.Geometry.Point(array[i].x,array[i].y),projection,new SuperMap.Projection("EPSG:4326"));
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}
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//支持AMap.LngLat的形式
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else if(array[i].getLng != undefined && array[i].getLat != undefined)
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{
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//首先转换为标准4326的坐标
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smPoint = SuperMap.Projection.transform(new SuperMap.Geometry.Point(array[i].getLng(),array[i].getLat()),projection,new SuperMap.Projection("EPSG:4326"));
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}
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var point =new AMap.LngLat(smPoint.x,smPoint.y);
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points.push(point);
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}
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return points;
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}
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}
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/**
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* APIMethod:
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* 将其他坐标系下的线数组转换为高德地图支持的线数组
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* @param array 线数组，支持两种形式
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* 1、var lines = [new SuperMap.Geometry.LineString(
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* new SuperMap.Geometry.Point(116.1,38.9),
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* new SuperMap.Geometry.Point(116.1,38.9)
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* )];
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* 2、var lines = [new AMap.Polyline(
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* new AMap.LngLat(116.3 ,39.9)
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* new AMap.LngLat(116.3 ,38.9)
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* )];
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* @param projection {SuperMap.Projection} 需要转换的线的坐标系
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* @returns {Array} 返回AMap.Polyline对象的数组
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*/
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SuperMap.Web.iConnector.AMap.transferLine = function(array,projection){
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if((typeof array) == "object" && array != null && array.constructor == Array)
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{
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var pro = projection || new SuperMap.Projection("EPSG:4326");
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var lines = [];
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//分几种不同的情况，现在只提供两种
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for(var i = 0;i<array.length;i++)
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{
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var line;
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//支持supermap的LineString
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if(array[i].CLASS_NAME && array[i].CLASS_NAME == "SuperMap.Geometry.LineString")
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{
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var points = SuperMap.Web.iConnector.AMap.transferPoint(array[i].components,pro);
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line = new AMap.Polyline({path:points,strokeColor:"#87CEFF"});
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}
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//支持AMap.Polyline的对象
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else if(array[i].constructor == AMap.Polyline)
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{
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var points = SuperMap.Web.iConnector.AMap.transferPoint(array[i].getLngLats(),pro);
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line = new AMap.Polyline({path:points,strokeColor:"#87CEFF"});
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}
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lines.push(line);
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}
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return lines;
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}
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}
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/**
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* APIMethod:
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* 将其他坐标系下的多边形数组转换为高德地图支持的多边形数组
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* @param array 多边形数组，支持两种形式：
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* 1、var polygons = [new SuperMap.Geometry.Polygon(
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* [new SuperMap.Geometry.LinearRing(
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* new SuperMap.Geometry.Point(116.3786889372559,39.90762965106183),
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* new SuperMap.Geometry.Point(116.38632786853032,39.90795884517671),
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* new SuperMap.Geometry.Point(116.38534009082035,39.897432133833574),
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* new SuperMap.Geometry.Point(116.37624058825688,39.89789300648029)
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* )
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* ]
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* )];
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* 2、var polygons = [ new AMap.Polygon(
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* new AMap.LngLat(116.3786889372559,39.90762965106183),
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* new AMap.LngLat(116.38632786853032,39.90795884517671),
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* new AMap.LngLat(116.38534009082035,39.897432133833574),
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* new AMap.LngLat(116.37624058825688,39.89789300648029)
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* )];
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* @param projection {SuperMap.Projection} 需要转换的多边形的坐标系
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* @returns {Array} 返回AMap.Polygon对象的数组
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*/
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SuperMap.Web.iConnector.AMap.transferPolygon = function(array,projection){
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if((typeof array) == "object" && array != null && array.constructor == Array)
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{
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var pro = projection || new SuperMap.Projection("EPSG:4326");
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var polygons = [];
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//分几种不同的情况，现在只提供两种
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for(var i = 0;i<array.length;i++)
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{
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var polygon;
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//支持supermap的Polygon
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if(array[i].CLASS_NAME && array[i].CLASS_NAME == "SuperMap.Geometry.Polygon")
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{
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var points = SuperMap.Web.iConnector.AMap.transferPoint(array[i].getVertices(false),pro);
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polygon = new AMap.Polygon({path:points, fillColor:"#87CEFF"});
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}
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//支持AMap.Polygon的对象
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else if(array[i].constructor == AMap.Polygon)
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{
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var points = SuperMap.Web.iConnector.AMap.transferPoint(array[i].getLngLats(),pro);
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polygon = new AMap.Polygon({path:points,strokeColor:"#87CEFF"});
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}
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polygons.push(polygon);
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}
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return polygons;
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}
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}
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